package com.example.a13745.sweetward.weather.db;

import android.app.Activity;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.a13745.sweetward.R;
import com.example.a13745.sweetward.weather.util.HttpUtil;
import com.example.a13745.sweetward.weather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * Created by 13745 on 2018/4/12.
 */

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE = 0;
    public static final int LEVEL_CITY = 1;
    public static final int LEVEL_COUNTY = 2;
    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList = new ArrayList<>();

    private List<Province> provinceList;    //省列表
    private List<City> cityList;            //市列表
    private List<County> countyList;        //县列表
    private Province selectedProvince;     //选中的省份
    private City selectedCity;              //选中的城市
    private int currentLevel;              //当前所在级别(省/市/县级页面)

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.choose_area, container, false);
        titleText=(TextView)view.findViewById(R.id.weather_titletext);
        backButton=(Button)view.findViewById(R.id.weather_backbutton);
        listView=(ListView)view.findViewById(R.id.weather_listview);
        if(Build.VERSION.SDK_INT>=23){
            adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, dataList);
        }
        else {
            ;//adapter = new ArrayAdapter<>();
        }
        listView.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if(currentLevel == LEVEL_PROVINCE) {
                    selectedProvince = provinceList.get(position);
                    queryCities();
                }
                else if(currentLevel == LEVEL_CITY) {
                    selectedCity = cityList.get(position);
                    queryCounties();
                }
                else if(currentLevel == LEVEL_COUNTY) {
                    String weatherId = countyList.get(position).getWeatherId();
                    Intent intent = new Intent();
                    intent.putExtra("weather_id", weatherId);
                    getActivity().setResult(Activity.RESULT_OK, intent);
                    getActivity().finish();
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(currentLevel == LEVEL_COUNTY) {
                    queryCities();
                }
                else if(currentLevel == LEVEL_CITY) {
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }

    //查询所有省
    private void queryProvinces() {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList= DataSupport.findAll(Province.class);
        if(provinceList.size()>0) {
            dataList.clear();
            for(Province province : provinceList) {
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }
        else {
            String address = "http://guolin.tech/api/china";
            queryFromServer(address, "province");
        }
    }

    //查询省内所有市
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList=DataSupport.where("provinceid = ?", String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0) {
            dataList.clear();
            for(City city : cityList) {
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }
        else {
            int provinceCode=selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/" + provinceCode;
            queryFromServer(address, "city");
        }
    }

    //查询市内所有县
    private void queryCounties() {
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList=DataSupport.where("cityid = ?", String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0) {
            dataList.clear();
            for(County county : countyList) {
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_COUNTY;
        }
        else {
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/" + provinceCode + "/" + cityCode;
            queryFromServer(address, "county");
        }
    }

    //若数据库里没查询到，根据指定的地址和类型从服务器上查询数据
    private void queryFromServer(String address, final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                //回到主线程
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        if(Build.VERSION.SDK_INT>=23) {
                            Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
                        }
                        else {
                            ;
                        }
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText = response.body().string();
                boolean result = false;
                if("province".equals(type)) {
                    result = Utility.handleProvinceResponse(responseText);
                }
                else if("city".equals(type)) {
                    result = Utility.handleCityResponse(responseText, selectedProvince.getId());
                }
                else if("county".equals(type)) {
                    result = Utility.handleCountyResponse(responseText, selectedCity.getId());
                }
                if(result) {
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if("province".equals(type)) {
                                queryProvinces();
                            }
                            else if("city".equals(type)) {
                                queryCities();
                            }
                            else if("county".equals(type)) {
                                queryCounties();
                            }
                        }
                    });
                }
            }
        });
    }

    private void showProgressDialog() {
        if(progressDialog==null) {
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
    }

    private void closeProgressDialog() {
        if(progressDialog!=null) {
            progressDialog.dismiss();
        }
    }
}
